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Sed One-Liners Explained

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My previous post was about Awk One-Liners Explained and now I bring to you Sed One-Liners Explained!

Most people are only familiar with one particular command of sed, namely the "s" (substitute) comand. s/comand/command/. That is unsatisfactory. Sed has at least 20 different commands for you.

For example, any ideas what this sed one-liner does?

sed '/n/!G;s/(.)(.*n)/&21/;//D;s/.//'

Read the article to find it out!
 read more | score:8887 | -pkrumins, November 22, 2008
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